From the main page, I have subpages based on
series...with a misc page that has all series
that I have three or fewer cels from..once I have
more than three, that series gets its own page.

On the series page, I have the thumbnails grouped
by character because it's easier to do that way.
If it was chronological, I'd have to figure out
exactly which ep each came from.

In my cel books, I currently have them grouped by
size (I have a mixture of small and large cel
books), then by series and character as above...
except newer cels are usually out of order until
I get the chance to move everything around.